<template>
  <div>
     <!-- 面包屑导航区 -->
     <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>     
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 2. 为ECharts准备一个具备大小（宽高）的Dom -->
      <div id="main" style="width: 800px;height:500px;"></div>
    </el-card>
  </div>
</template>


<script>
    // 1. 导入echarts
    import echarts from 'echarts'
    import _ from 'lodash'


    export default {
        data() {
            return {
                // 需要合并的数据
                options: {
                    title: {
                        text: '用户来源'
                    },
                    tooltip: {
                        trigger: 'axis',
                        axisPointer: {
                            type: 'cross',
                            label: {
                                backgroundColor: '#E9EEF3'
                            }
                        }
                    },
                    grid: {
                        left: '3%',
                        right: '4%',
                        bottom: '3%',
                        containLabel: true
                    },
                    xAxis: [{
                        boundaryGap: false
                    }],
                    yAxis: [{
                        type: 'value'
                    }]
                }
            }
        },
        created() {

        },
        // 此时页面上的元素已经被渲染完毕了
        async mounted() {
            //  3. 基于准备好的dom，初始化echarts实例
            var myChart = echarts.init(document.getElementById('main'));

            const {
                data: res
            } = await this.$http.get("reports/type/1");
            if (res.meta.status != 200) {
                return this.$message.error("获取折线图数据失败")
            }
            console.log(res.data);

            // 4. 准备数据和配置项
            const result = _.merge(res.data, this.options);
            // 5.展示数据
            myChart.setOption(result);
        },
        methods: {

        },
    }
</script>


<style lang="less" scoped>

</style>